[Bluez-users] Multiple RFCOMM disconnection problem

[Bluez-users] Multiple RFCOMM disconnection problem

[Agustin Fusaro]

Hi everybody, here's my problem:

When I try to connect more than 2 RFCOMM connections (on different
ports), everything works fine until I disconnect the last connection:

In other words, I can create multiple RFCOMM connections on different
ports, but when I try and disconnect, the computer freezes (on fedora 4
kernel 2.6.11) or just displays a segfault and I can't kill the process
(o Knoppix kernel 2.6.14).

I tried with different USB dongles, updated to the last release of Bluez
(rfcomm version 2.22) and nothing changes...

This is a very strange problem... and only ocurrs when I try to connect
to more then 2 BT devices.

Here's what I do:
I have two computers, each one with one dongle. On the listener side I
run on different terminals:

>rfcomm listen 1 1
>rfcomm listen 2 2
>rfcomm listen 3 3
and so on...

on the client side I run

>rfcomm connect 1 <bdaddress> 1
>rfcomm connect 2 <bdaddress> 2
>rfcomm connect 3 <bdaddress> 3

everything works fine until I disconnect (CTRL+C from the client side)
the 3rd connection. I tried with more than 3 connections and the system
freezes when I disconnect the last connection.

I'd really appreciate any feedback on this problem... I am at a lost
here... Has this ever happened to you?

Thanks very much for your time!

Agustin Fusaro



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Re: [Bluez-users] Multiple RFCOMM disconnection problem

[Marcel Holtmann]

Hi Augustin,

> When I try to connect more than 2 RFCOMM connections (on different
> ports), everything works fine until I disconnect the last connection:
> 
> In other words, I can create multiple RFCOMM connections on different
> ports, but when I try and disconnect, the computer freezes (on fedora 4
> kernel 2.6.11) or just displays a segfault and I can't kill the process
> (o Knoppix kernel 2.6.14).
> 
> I tried with different USB dongles, updated to the last release of Bluez
> (rfcomm version 2.22) and nothing changes...
> 
> This is a very strange problem... and only ocurrs when I try to connect
> to more then 2 BT devices.
> 
> Here's what I do:
> I have two computers, each one with one dongle. On the listener side I
> run on different terminals:
> 
> >rfcomm listen 1 1
> >rfcomm listen 2 2
> >rfcomm listen 3 3
> and so on...
> 
> on the client side I run
> 
> >rfcomm connect 1 <bdaddress> 1
> >rfcomm connect 2 <bdaddress> 2
> >rfcomm connect 3 <bdaddress> 3
> 
> everything works fine until I disconnect (CTRL+C from the client side)
> the 3rd connection. I tried with more than 3 connections and the system
> freezes when I disconnect the last connection.
> 
> I'd really appreciate any feedback on this problem... I am at a lost
> here... Has this ever happened to you?

I need some details of your kernel. Send in "lsmod" and "modinfo rfcomm"
and also "uname -a". Do you see an oops in the logs?

Regards

Marcel




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Re: [Bluez-users] Multiple RFCOMM disconnection problem

[Agustin Fusaro]

Hi Marcel,
Here is the data you requested:

lsmod:

Module                  Size  Used by
parport_pc             28933  1
lp                     13001  0
parport                40585  2 parport_pc,lp
autofs4                29253  2
rfcomm                 42333  0
l2cap                  30661  5 rfcomm
bluetooth              56133  6 rfcomm,l2cap
sunrpc                167813  1
dm_mod                 58101  0
video                  15941  0
button                  6609  0
battery                 9413  0
ac                      4805  0
md5                     4033  1
ipv6                  268097  8
uhci_hcd               35152  0
ehci_hcd               41037  0
i2c_viapro              8017  0
i2c_core               21569  1 i2c_viapro
snd_via82xx            30081  1
gameport               18633  1 snd_via82xx
snd_ac97_codec         75961  1 snd_via82xx
snd_seq_dummy           3653  0
snd_seq_oss            37057  0
snd_seq_midi_event      9153  1 snd_seq_oss
snd_seq                62289  5
snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_pcm_oss            51185  0
snd_mixer_oss          17857  2 snd_pcm_oss
snd_pcm               100169  3 snd_via82xx,snd_ac97_codec,snd_pcm_oss
snd_timer              33605  2 snd_seq,snd_pcm
snd_page_alloc          9669  2 snd_via82xx,snd_pcm
snd_mpu401_uart        10049  1 snd_via82xx
snd_rawmidi            30305  1 snd_mpu401_uart
snd_seq_device          8781  4
snd_seq_dummy,snd_seq_oss,snd_seq,snd_rawmidisnd
57157  11
snd_via82xx,snd_ac97_codec,snd_seq_oss,snd_seq,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer,snd_mpu401_uart,snd_rawmidi,snd_seq_device
soundcore              10913  2 snd
via_rhine              28361  0
mii                     5441  1 via_rhine
floppy                 65269  0
ext3                  132553  1
jbd                    86233  1 ext3

modinfo rfcomm:

filename:       /lib/modules/2.6.11-1.1369_FC4/kernel/net/bluetooth/rfcomm/rfcomm.ko
author:         Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann
<marcel@holtmann.org>
description:    Bluetooth RFCOMM ver 1.5
version:        1.5
license:        GPL
alias:          bt-proto-3
vermagic:       2.6.11-1.1369_FC4 686 REGPARM 4KSTACKS gcc-4.0
depends:        bluetooth,l2cap
srcversion:     0F01C84C05D0CC738907E51

uname -a

Linux lab04l 2.6.11-1.1369_FC4 #1 Thu Jun 2 22:55:56 EDT 2005 i686
athlon i386 GNU/Linux

This data is for the Fedora 4 distribution. I downloaded and installed
the latest BlueZ library and utilities.

Thanks very much for your time

Regards,
Agustin


On Fri, 2005-11-25 at 19:44 +0100, Marcel Holtmann wrote:
> Hi Augustin,
> 
> > When I try to connect more than 2 RFCOMM connections (on different
> > ports), everything works fine until I disconnect the last connection:
> > 
> > In other words, I can create multiple RFCOMM connections on different
> > ports, but when I try and disconnect, the computer freezes (on fedora 4
> > kernel 2.6.11) or just displays a segfault and I can't kill the process
> > (o Knoppix kernel 2.6.14).
> > 
> > I tried with different USB dongles, updated to the last release of Bluez
> > (rfcomm version 2.22) and nothing changes...
> > 
> > This is a very strange problem... and only ocurrs when I try to connect
> > to more then 2 BT devices.
> > 
> > Here's what I do:
> > I have two computers, each one with one dongle. On the listener side I
> > run on different terminals:
> > 
> > >rfcomm listen 1 1
> > >rfcomm listen 2 2
> > >rfcomm listen 3 3
> > and so on...
> > 
> > on the client side I run
> > 
> > >rfcomm connect 1 <bdaddress> 1
> > >rfcomm connect 2 <bdaddress> 2
> > >rfcomm connect 3 <bdaddress> 3
> > 
> > everything works fine until I disconnect (CTRL+C from the client side)
> > the 3rd connection. I tried with more than 3 connections and the system
> > freezes when I disconnect the last connection.
> > 
> > I'd really appreciate any feedback on this problem... I am at a lost
> > here... Has this ever happened to you?
> 
> I need some details of your kernel. Send in "lsmod" and "modinfo rfcomm"
> and also "uname -a". Do you see an oops in the logs?
> 
> Regards
> 
> Marcel
> 
> 
> 
> 
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